Angularjs $ routeparams和$ location之间的区别

Question

app.controller('GetData', function ($scope, $location, $routeParams)
{
var searchObject = $location.search();  
$scope.isActiveFromLocation = (searchObject.state == "active");      
$scope.isActiveFromRoute = ($routeParams.state == "active"); 
}

在上面的代码中，我试图通过angularjs从url querystring www.testsite.com/#xyz?state=active获取数据。我调试并发现两个范围变量都显示相同的结果。在这种情况下哪个选项最好读取查询字符串值？有什么建议。